Hi Melay,
Unfortunately your game data is saved to your device, which means that deleting the game or switching your device will cause your progress to be lost. You can try to recover your game progress by restoring an iTunes backup of your old device on your new device. Here's a quick guide on how to do this:
http://support.apple.com/kb/ht2109.
In case you have an Android device, you should be able to restore your progress if you download the game using the same google account, and using the same Nanobit ID.
Kind regards.